Centuries after the fallen angels left heaven to live among humans, their Nephilim descendants dwell in secret, hidden from the modern world. Once, a charismatic leader known as the Phoenix led their people, but he vanished centuries ago. The few surviving Great Houses are in decline, bickering over petty rivalries while a handful of faithful warriors battle to keep the forces of evil at bay.
Eighteen-year-old Aiden McLachlan devotes her life to her studies and pursues her lifelong goal to become a full-fledged Watcher. But everything she knows of her life is a lie and everyone a liar. Through a strange twist of fate, she finds herself caught up in an ancient prophecy.
The stars predict the rebirth of the Nephilim leader, but the mystery must be unraveled or the Phoenix cannot rise. With a soul-eating demon, a coven of ancient vampires, and a hardheaded Celtic warrior competing to subvert the Phoenix, Aiden doesn't know where to turn or who she can trust.